Mathematics - 10 June 2007

2007-06-10 23:53:29 · 10 answers · asked by Amanda B 1

2007-06-10 23:48:49 · 3 answers · asked by Anonymous

Also, how many angles and sides at the minimum do you need to find the area?

2007-06-10 23:41:06 · 10 answers · asked by tropicalia_la 3

I can't type the symbols for degrees here so please excuse me for that. The terms in degrees are in the brackets.

1. sin ^ 2( 30) - 2 cos ^ 3 (60) + 3 tan ^ 4 (45)
2. {cos ( 0 ) + sin (45) + sin (30 ) } { sin (90) - cos (45) + cos (60) }

I'm getting the answers as 1) . 3 and 2) 1 3/4 , but I 'm not sure.

2007-06-10 22:57:59 · 4 answers · asked by Anonymous

I don't know how to do these, can someone explain please.

1. A bag contains 5 red, 6 blue, 2 white and 7 green balls. If 2 are seleccted at random (without replacement), find the probability of getting at least 1 red ball.

Answer: 17/38

2. In a group of people, 32 are Australian born, 12 were born in Asia, 7 were born in Europe. If 2 of the people are selected at random, find the probability that at least 1 of them will be Australian born.

Answer: 368/425

3. There are 34 men and 32 women at a party. Of these, 13 men and 19 woman are married. If 2 people are chosen at random, find the probability that both will be married.

Answer: 496/2145

2007-06-10 21:38:40 · 4 answers · asked by Anonymous

How do I subtract 7.5% from €1,947.96???

2007-06-10 21:36:11 · 10 answers · asked by ? 2

find d4f/4x4 if y=x4(x5-2) using leibainty rule?

2007-06-10 20:44:14 · 1 answers · asked by Bature O 1

What is the largest perfect number? What mathematician made an attempt at deriving a formula to produce more of them?

2007-06-10 20:12:48 · 4 answers · asked by Dan G 2

ABCD is a square. P is a point in the square such that PA = a, PB = 2a and PC = 3a. Find angle APB.

A) 120 deg
B) 130 deg
C) 135 deg
D) 140 deg
E) 145 deg


This question came from a local mathematical olympiad competition I had just a few weeks ago. I have finished it already but I am unsure of the answers. Note that no calculators and geometrical instruments are allowed.

Please show how you do it.

2007-06-10 20:12:00 · 3 answers · asked by to0pid 2

2007-06-10 19:42:07 · 7 answers · asked by Anonymous

875=2(t1 * t2)+t1^2
90= t1+t2

find t1 and t2?

Please help and show steps.

2007-06-10 19:19:57 · 10 answers · asked by lenny b 1

cosA +tanAsinA = secA

prove that the left hand side equals the right hand side.

2007-06-10 19:05:41 · 14 answers · asked by stacey_b 2

It is supposed to have a factor between 9000 and 10000

Please someone factorize it.

It will be highly appreciated if you can tell me how to get the factors without using computer programs.

The number is 1 followed by 8 zeros then 99

2007-06-10 19:03:49 · 4 answers · asked by astrokid 4

2007-06-10 19:00:43 · 3 answers · asked by hassan j 1

Find the equation of a straight line passing through origin and the point of intersection of the lines x+2y=7 and x-y=4.Please show the full process also.

2007-06-10 18:53:32 · 3 answers · asked by zoha 2

2007-06-10 18:53:17 · 14 answers · asked by islam540 1

My sample is 11 classes, so i clearly have a problem becuase it is an odd number (i have two treatments). So i was wondering if this is random. Create two pieces of paper, each one written a type of treatment. Have all 11 teachers randomly select one of the papers so that each class has a 50% chance of getting a certain type of treatment. Is this a random allocation?

2007-06-10 18:46:37 · 1 answers · asked by Aiuta 1

My sample is English honors student and i have 11 classes as samples. There are two treatments so i have to divded the classes into half randomly. The problem is, there is an odd number of samples! Iono what to do. Could you guys help me? Thanks!
I thought of eliminating the 11th class and randomly assign only 10 classes. Also, i thought of randomly select one class to divide into two. Do you think this is random? How about having the teachers of each class randomly select a treatment (probably by selecting a piece of paper).

2007-06-10 18:39:47 · 1 answers · asked by Aiuta 1

2007-06-10 18:32:11 · 9 answers · asked by CrimeLab 4

2007-06-10 18:25:44 · 5 answers · asked by Ashlee M 1

Find the FACTORS of the polynomial: x4 - x3 - 19x2 - 11x + 30 = 0

what are the FACTORS in the form (ax+b)??

please help me ~!!

2007-06-10 17:53:08 · 5 answers · asked by Genius star ;) 2

a car travels for 2 hours at a certain speed and then three hours more at a speed of 10km/h faster than this. If the entire distance travelled is 455km find the car's speed in the first two hours of travel

2007-06-10 17:44:23 · 12 answers · asked by Anonymous

x – 2y = –15
4x + 3y = –16

2007-06-10 17:43:10 · 5 answers · asked by Phaedra C 1

2007-06-10 17:36:51 · 6 answers · asked by Anonymous

The ratio of the base radius and height of a cone is 3:4. If the cost of smoothening the curved surface area at 5 cents per 1 sq cm is $115.50, then find the volume of the liquid contained in it.

please show all work and if possible, include a diagram. thanks in advance.

2007-06-10 17:34:23 · 1 answers · asked by tochau 5

the underscore symbol (_) indicates a subscript. Please solve for x. An explanation would be nice. Thanks

2007-06-10 17:26:25 · 3 answers · asked by Anonymous

please solve for x. an explanation would be nice. Thanks

2007-06-10 17:22:25 · 9 answers · asked by Anonymous

for my math project, im trying to predict the future world record time of the men's 200m and the women's triple jump.

I'm using the equations y=ab^x and y=ax^b. My teacher said each equation is fit to predict the future times of a jumping or a running event.

So what is the difference between the exponential function and the power function?

2007-06-10 17:20:10 · 2 answers · asked by Anonymous

Give the measure in degrees of the angle described.

/A represents 1/5 of a complete circle.

2007-06-10 17:10:51 · 6 answers · asked by marianne d 2

Randolph's used 12 more gal of fuel oil in Oct than in Sept and twice as much oil in November as in Sept. If they used 132 gal for 3 months, how much was used during each month?

I want to say the answer is 44 but, not sure. If they used different amounts each month as stated in the problem.

2007-06-10 17:08:25 · 7 answers · asked by Anonymous